<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			body{
				font-weight: bolder;
				font-size: 24px;
			}
			#box{
				width: 1200px;
				height: 800px;
				border: 2px solid red;
				display: flex;
				/* 先使其折行 */
				flex-wrap: wrap;
				
				/* 对齐纵轴起点 */
				/* align-content: flex-start; */
				
				/* 对齐纵轴终点 */
				/* align-content: flex-end; */
				
				/* 在纵轴上居中对齐 */
				/* align-content: center; */
				
				/* 在纵轴两端对齐 */
				/* align-content: space-between; */
				
				/* 在纵轴上均匀分布 */
				/* align-content: space-around; */
				
				align-content: stretch;
				
			}
			.column{
				width: 200px;
				height: 100px;
				line-height: 100px;
				border: 1px solid black;
				text-align: center;
				
			}
		</style>
	</head>
	<body>
		<div id="box">
			<div class="column" id="one">一</div>
			<div class="column" id="two">二</div>
			<div class="column" id="three">三</div>
			<div class="column" id="four">四</div>
			<div class="column" id="five">五</div>
			<div class="column" id="six">六</div>
			<div class="column" id="seven">七</div>
			<div class="column" id="eight">八</div>
			<div class="column" id="nine">九</div>
			<div class="column" id="ten">十</div>
			<div class="column" id="eleven">十一</div>
		</div>
	</body>
</html>
